WELDTECH WT40DC, Руководство по эксплуатации

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WT40DC Plasma Cutter
www.weldtech.net.nz
Compressed Air Requirements
A reliable and consistent supply of clean dry com-
pressed air is essential for proper operation of the
WT40DC. Although the machine contains its own in-
ternal air supply filtration system, it is recommended
the compressed air supply should have external fil-
tration in the line feeding the machine, both a stand-
ard water trap (sintered bronze filter) and also a coa-
lescing filter (for oil in air).
The air requirement is a minimum of 120 l/min
(4.5cfm) Free Air Delivery (FAD) at 75 PSI pressure.
This normally means the compressor must be a belt
drive model or if a direct drive it must have a motor
power of 2.5HP or greater.
The air must be dry and free of oil and moisture
(normally a symptom of older, worn out compres-
sors). The air hose must also be of sufficient size
(3/8”/10mm minimum) to supply the machine.
Operating Environment
Adequate ventilation is required to provide proper
cooling for the WT40DC. Ensure that the machine
is placed on a stable level surface where clean cool
air can easily flow through the unit. The WT40DC
has electrical components and control circuit boards
which may be damaged by excessive dust and dirt,
so a clean operating environment is important for re-
liable product life.
Basic Operation
1.1 Connect the earth cable quick connector to the
earth connection socket (11) Connect the earth
clamp to the work piece. Contact with the work
piece must be firm contact with clean, bare
metal, with no corrosion, paint or scale at the
contact point.
1.2 Connect the rolling nut plasma torch fitting to
the machine plasma torch power/air outlet (13).
Ensure it is tightened firmly by hand. Connect
the plasma torch switch lead to the machine
socket (12)
1.3 Connect the machine to suitable mains power
using the mains input power lead (1). Switch the
mains power switch (2) to ‘on’ to power up the
machine.
1.4 Connect the compressed air supply to the
machine inlet (3). Check the air pressure (4).
Trigger the air flow using the ‘gas’ function
(10), check the air pressure again and adjust if
necessary. Return the setting to ‘cut’.
1.5 Select the output current using the current
control knob (8). You are now ready to plasma
cut!
Material
Thickness (mm) 0.5 2
4 6 8 10
Output Current
Setting (A)
15 20 30 35 40 40
Amperage Guide
Plasma Cutting
Guide
Effect of Cutting Speed
TOO FAST TOO SLOW CORRECT
Piercing Technique
1. To start a pierce, tilt the torch
to prevent molten material from coming
back against and damaging the torch.
2. When the arc breaks
through the work, bring the
torch to an upright position
and proceed to cut
NOTE:
Keep moving while cutting. Cut at a steady
speed without pausing. Maintain the cutting speed
so that the arc lag is 10° to 20° behind the travel di-
rection. Use a 5° - 15° leading angle in the direction
of the cut.